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Patented Oct. 14-, .1924.

UNITED STATES PATENT OFFICE.

, HENBYJAKES WHEELER BLISS, OF LEEDS, ENGLAND, ASSIGNOB TO THE BRITISHBE- SEARCH ASSOCIATION, FOR THE WOOLEN' AND WORSTED INDUSTBJE rnocnssronran 'rnmrm'r or Years.

80 Drawing;

To all wh'om it may concern:

' Be it known that I, HENRY JAMES WHEELER Buss, a Britishsubject,residin at Leeds, in the'county of York, Englan 6 have invented aProcess for the Treatment of Yarns, of which the following is aspecification.-

This invention relates to a process, as hereinafterdescribed, for thetreatment of 10 yarns com sed chiefly or wholly of wool and/or hair,thesaid process bein such asto modify the yarn so that it enhanced powerof shrinking when wetted as compared with ordinary yarn, The term yarnas hereinafter used in this specification and the claims will beunderstood to refer to yarns madechiefly or wholly'of wool or hairorwool and hair or other materials having the characteristics of wool orhair.

The process according to my invention consists in wetting or at leastmoistening the yarn and then stretching it a definite amountsubstantially greater than that employed for straightening yarn in hankform as in dyeing, say not less than eight per cent in any case. By thusstretching the formed yarn the individual hairs or fibres are eachindividuall stretched, there being no substantial slipping of the hairsor fibres in the yarn by of the yarn. The "yarn is then allowed to dryin the stretched condition, the dr ing being hastened, if desired, bythe app ica- 85 tion of heat and/or circulation of air or gasessoapplied as to allow of the free esca will e found to shrink somewhat butnot to its original length. On again wetting or 40 moistening thestretched yarn however, it

will be found to shrink greatly even in some cases to its originallength or less.

For, the purpose of this invention it is clear that the yarn selectedmust be of suflicient strength and elasticity to bear the treatmentdescribed without an undue pro portion of breakages.

This process does not refer to the customary reducing or draftingprocesses by which slivers of wool are successively d1- minished indiameter till the 'yarn is reached, such processes depending principallyon a slipping of the fibres one upon reason of the twist' of themoisture. ()n release, the yarn- Application filed November 10, 1922.Serial No. 800,168.,

another and the consequent reduction of the number of fibres present ina cross-section.

I am aware that in ordinary winding, v yarn may be stretched to varyingextents and that unequal take up and other faults often result. Ihowever re larize the stretch and take up andpr use a yarn with mucheater take up than heretofore and one whlch is articular-1 useful in theconstruction of fa rics e. g. osie-ry, where, by inserting a portion ofmy im roved yarn a ternately wit a ortion of ordinary yarn, fancy orshaped .e cots are obtained.

If desired, the am may be heated while in the moist an stretchedcondition but while preventing its drying, e. g. by exosing it to theaction of saturated steam.

nder these circumstances it becomes fixed more .or less in its stretchedcondition, thus producing a yarn of greater permanent length or highercount; the amount of increase of length dependin upon the amount theyarn is stretched, t e length of time it is heated, the temperature, andthe amount of moisture present. What I claim as my invention, and desireto secure by Letters Patent is 1. The process for modifying yarn havingthe characteristics of wool or hair, according to which the am ismoistened and then stretched to a de nite amount substantially greaterthan that employed for 85 straightening yarn'in hank form as in dyeing,say not less than eight per cent in any case, and then drying the yarnwhile in the stretched condition, the result being the production of ayarn with much greater take u than heretofore. i

2. Tlie process for modifying yarn havingthe characteristics of wool orhair, according to which the yarn is moistened and then stretched to adefinite amount substantially greater than that employed forstraightening yarn in hank form as in dyeing, say not less than eightper cent in any case, and then subjecting said yarn to moist heat beforerelease so as to increase its permanent length or count.

3. The'process for modifying yarn having thecharacteristies of wool yarnaccording to which the yarn is moistened and then stretched to adefinite amount substantially greater than that employed forstraightenits ing yarn in hank form as in dyeing, say then moistened,whereby through the un- 10 not less than eight per cent in any'case,dryequal shrinkages of the two yarns, a shaped ing the yarn under thistension, releasing fabric'is produced. v

the tension, andthen subsequently re-moist- In witness whereof -I havehereunto set ening as and for the purposes specified. my hand in thepresence-of two witnesses.

- 4. The process in which am is modified HENRY JAMES WHEELER BLISS.

as specified in claim 1 an then associated Witnesses :v

with. other am not so modified in a predev JOHN Jowm'r,

termined re ation in a fabric and the fabric Oran. BELLAMY.

